I bought this product after watching a youtube channel, and the person who used this product then decided to bought the BRAND because she likes this product a lot. Since she is a professional in the field (she is called Unnie Ahn) so I trust her, and I'm glad I did. It is a very nice ampoule, it does its job really well. If you're looking for sth to soothe and calm your skin then give this a try.